Round and square connected pile plate type retaining wall pile foundation structure

According to the technical scheme, the pile foundation structure of the round and square connected pile plate type retaining wall comprises a single pile foundation structure and a prefabricated soil retaining plate. The number of the single pile foundation structures is multiple. The prefabricated breast boards are arranged between every two adjacent single pile foundation structures; each single pile foundation structure comprises a square pile foundation and a circular pile foundation which are integrally and fixedly connected; the square pile foundation is positioned above an excavated ground line; the bottom of the circular pile foundation is located below an excavated ground line, and the top of the circular pile foundation is located in the bottom of the square pile foundation. The integral stress effect is guaranteed, meanwhile, the risk of manually excavating the pile foundation is eliminated, the construction difficulty is reduced, and the engineering investment is saved. 本实用新型采用的技术方案是：一种圆方相接型桩板式挡土墙